On Mon, Mar 05, 2018 at 02:02:38PM -0800, Tim Harvey wrote:
> This patch adds documentation of device-tree bindings for the
> Gateworks System Controller (GSC).
>
> Signed-off-by: Tim Harvey <tharvey@xxxxxxxxxxxxx>
> ---
> Documentation/devicetree/bindings/mfd/gsc.txt | 159 ++++++++++++++++++++++++++
> 1 file changed, 159 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/mfd/gsc.txt
>
> diff --git a/Documentation/devicetree/bindings/mfd/gsc.txt b/Documentation/devicetree/bindings/mfd/gsc.txt
> new file mode 100644
> index 0000000..fe5d114
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mfd/gsc.txt
> @@ -0,0 +1,159 @@
> +Gateworks System Controller multi-function device
> +
> +The GSC is a Multifunction I2C slave device with the following submodules:
> +- WDT
> +- GPIO
> +- Pushbutton controller
> +- HWMON
> +
> +Required properties:
> +- compatible : Must be "gw,gsc_v1", "gw,gsc_v2", "gw,gsc_v3"
s/_/-/
> +- reg: I2C address of the device
> +- interrupts: interrupt triggered by GSC_IRQ# signal
> +- interrupt-parent: Interrupt controller GSC is connected to
> +- #interrupt-cells: should be <1>, index of the interrupt within the
> + controller, in accordance with the "one cell" variant of
> + <devicetree/bindings/interrupt-controller/interrupt.txt>
> +
> +Optional nodes:
> +* watchdog:
> +The GSC provides a Watchdog monitor which can power cycle the board's
> +primary power supply on most board models when tripped.
> +
> +Required properties:
> +- compatible: must be "gw,gsc-watchdog"
> +
> +* input:
> +The GSC provides an input device capable of dispatching Linux Input events
Linux details that are not relevant to the binding.
> +for user pushbutton events, tamper switch events, etc.
> +
> +Required properties:
> +- compatible: must be "gw,gsc-input"
> +
> +* hwmon:
> +The GSC provides a set of Analog to Digitcal Converter (ADC) pins used for
> +temperature and/or voltage monitoring.
> +
> +Required properties:
> +- compatible: must be "gw,gsc-hwmon"
> +
> +Example:
> +
> + gsc: gsc@20 {
> + compatible = "gw,gsc_v2";
> + reg = <0x20>;
> + interrupt-parent = <&gpio1>;
> + interrupts = <4 GPIO_ACTIVE_LOW>;
> + interrupt-controller;
> + #interrupt-cells = <1>;
> +
> + gsc_input {
input {
> + compatible = "gw,gsc-input";
> + };
> +
> + gsc_watchdog {
watchdog {
> + compatible = "gw,gsc-watchdog";
> + };
> +
> + gsc_hwmon {
hwmon {
> + compatible = "gw,gsc-hwmon";
> + #address-cells = <1>;
> + #size-cells = <0>;
> +
> + hwmon@0 { /* A0: Board Temperature */
> + type = <0>;
Not documented.
> + reg = <0x00>;
> + label = "temp";
> + };
> +
> + hwmon@1 { /* A1: Input Voltage */
> + type = <1>;
> + reg = <0x02>;
> + label = "Vin";
> + };
> +
> + hwmon@2 { /* A2: 5P0 */
> + type = <1>;
> + reg = <0x0b>;
> + label = "5P0";
> + };
> +
> + hwmon@4 { /* A4: 0-5V input */
> + type = <1>;
> + reg = <0x14>;
> + label = "ANL0";
> + };
> +
> + hwmon@5 { /* A5: 2P5 PCIe/GigE */
> + type = <1>;
> + reg = <0x23>;
> + label = "2P5";
> + };
> +
> + hwmon@6 { /* A6: 1P8 Aud/Vid */
> + type = <1>;
> + reg = <0x1d>;
> + label = "1P8";
> + };
> +
> + hwmon@7 { /* A7: GPS */
> + type = <1>;
> + reg = <0x26>;
> + label = "GPS";
> + };
> +
> + hwmon@12 { /* A12: VDD_CORE */
> + type = <1>;
> + reg = <0x3>;
> + label = "VDD_CORE";
> + };
> +
> + hwmon@13 { /* A13: VDD_SOC */
> + type = <1>;
> + reg = <0x11>;
> + label = "VDD_SOC";
> + };
> +
> + hwmon@14 { /* A14: 1P0 PCIe SW */
> + type = <1>;
> + reg = <0x20>;
> + label = "1P0";
> + };
> +
> + hwmon@15 { /* fan0 */
> + type = <2>;
> + reg = <0x2c>;
> + label = "fan_50p";
> + };
> +
> + hwmon@16 { /* fan1 */
> + type = <2>;
> + reg = <0x2e>;
> + label = "fan_60p";
> + };
> +
> + hwmon@17 { /* fan2 */
> + type = <2>;
> + reg = <0x30>;
> + label = "fan_70p";
> + };
> +
> + hwmon@18 { /* fan3 */
> + type = <2>;
> + reg = <0x32>;
> + label = "fan_80p";
> + };
> +
> + hwmon@19 { /* fan4 */
> + type = <2>;
> + reg = <0x34>;
> + label = "fan_90p";
> + };
> +
> + hwmon@20 { /* fan5 */
> + type = <2>;
> + reg = <0x36>;
> + label = "fan_100p";
> + };
> + };
> + };
> --
> 2.7.4
>
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